Safety-stop for box-staying machines.



H. w. JACKSON (11.1). HORTON. SAFETY STOP FOR BOX STAYING MACHINES.

APPLICATION FILED OCT. 22, I915- Iafented J uly 25, 1916.

2 SHEETS-SHEET l- WcZEcJsozr n 0% 75972, M

marl/r095 #2222 00/9 r AWL H. W. JACKSON & J. O. HORTON.

SAFETY STOP FOR BOX STAYING MACHINES.

APPLICATION FILED OCT. 22. I915.

Patented July 25, 1916.

2 SHEETS-SHEET 2 UNITED STATES PATENT OFFICE.

HENRY W. JACKSON, OF CYNWYD, AND JOHN O. HORTON, OF MONTBOSE, PENNSYL- VANIA, ASSIGNORS TO NATIONAL METAL EDGE BOX COMPANY, OF PHILADELPHIA,

PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

SAFETY-STOP, FOB- BOXL-STAYING MACHINES.

,Specification of Letters Patent.

Patented July 25, 1916.

Application filed October 22, 1915. Serial No. 57,386.

To all whom it may concern: Be it known that we, HENRY W. J ACKSQN and Join: O. HoR'roN, citizens ofthe United States, residing, respectively, at Cynwyil, State of Pennsylvania, and Montrose, Pennsylvania,l1ave invented a new and-useful Improvement in Safety-Stops for :Box-

, Staying Machines, of which the following in s %his invention relates to that class of staying machines in which the metalstay'fis applied to the box edge or any othera'rticle by the action of a die being causedtode- I scend upon a rigid anvil, compressing the box and stay therebetween. Said anvil, upon which the box is placed for the appli cation of the stays, is usually of substan- 'tially rectangular cross section andi posb tioned diamond-wise, with its 'horizontal'active edge uppermost. Against-this'edge the 'die descends and does its'work.

In the operation of staying (for example) a box, the operator places the two box sides forming said angle upon the two faces-of the anvil contiguous to its active'edge, Land holdsthe same close with his fingers during the application of the stay. This operatibn requires that the operator shall keep his finj gers close to the joint and yet not too-close.

To decrease danger'of accident and protect the'operators, it is desirable to provide some safety device.

I The object of this invention is to provide a safety stop for machines of this and similar character wherein appropriate parts are supplied, attached on either side of the die holder, and projectin downwardly inadvance of the die, an so positioned as-to contact with the operators fingers if'=he has inadvertently placed them within the danger zone, and thereby set in action mechanism which will instantly stop the descent of "the die.

The device may be separate and distinct from the usual operating clutch of the staying machine, which remains operable as usual.

In the drawings: Figure 1 is a side elevation of a box staying machine embodying the invention. Fig. 2 is apartialsectional view of same. Fig. 3 is a partial front view of same. Fig. 4 is an enlarged sectional view through the driving and clutch mechanlsm. Fig. 5 is an-enlarged detail view of acne oftheclutch'levers. i

The metal strip a is carr'ed in the shape of-a strip on a drum. 6 the rear of the l m'achine. Thence the strip isled :touthe "ithroat cywhich is a long-guidewayepivotjallyzattached to the rear of die dand otheriwlse supported by the frame.of themachine at e. f The-throat carries aiholdjng pawlg is the.feed zpawl? carried ,by. bloc ,Vh :which slides along the throat i and ;;is.;actu- :azbell crank lever whichpbyrod' j and crank is driven from the main-crank pin. 1 ;-.-The.actionl'of pawls f andg in-gripping the .strip' and moving italong the. throat is zatedrbya. slotted'connection with arm i-of lnot further developed herein, asthe same is "well: understood in the art and forms no part of the present invention.

an Diei-d 's actuated in slideway lby knuckle *levers mand n, and connecting rod.o, from v main crank -p'on shaft 2g. Thisshaft re- 7 -ceives its motion, through thefixed clutch member sand'the loose gear 1' (see Fig. .4), in suchmanner that whentheioot is placed up'on foot lever t, the end 11. of thelclutch lever is withdrawn from the slot in member 's','=whereupon the L-shaped key 0 is. pressed :by its springinto one of the alining holes in gear 1-, and motion is transmitted to the shaft. 1

Upon releasing the foot lever, spring w returns the end u of the clutch lever within the groove in member s, cam surface a: (see F ig. 5) coactin with the L-shaped key 1; to withdraw it rom connection with gear r, and the machine is stopped. That said stoppage of the machine may bemade to take place instantaneously with the withdrawal of power from gear 1', the end of shaft q is enga ed by a brake clamp y. The anvil a is rigi ly mounted on the front of the machine directly below the die.

6 are finger guards supported at either side of the die, and actuated in unison, by being connected with the square ends of pin 7 carried by a bracket 8 mounted upon the die head d. As seen in Fig. 3, the lower edges of guards 6 are turned inwardly toward each other, so thatas the die is depressed toward the anvil if the operators fingers ar lever 12 near its' intermediate pivot on bracket 8. The long arm of lever-12 pro- 1.

in a dangerons position on either face of the anvil, sa d turned-m portions will contact with the'operators fingers and be raised be-' fore the die can strike them. The finger guards are held in operative position' by spring 9 holding one of them against a stop pin 10 on bracket 8. This finger'guardis connected by a link 11 with one end of a jects downwardly and carries a pin 13, so 'that a very slight movement of the finger guards is multiplied to give amore appreciable movement to pin 13.

14 is a bell crank pivoted to a bracket on the frame of'the machine. v '3 15 is a disk formed with a stop against which one end of hell crank 14 is held; when in operative position, by spring-16. @The bell crank, moreover, issopositioned that one arm is exactly vertical, and in line-.with

and very close to pin 13 on-lever; 12. :In

this way,- during thenormal actionof the machine; the die with the finger guard's-is lowered :and raised -without actuating-e the bell crank lever 14, pin 13moving down and up very;close to the vertical arm of said bell fcrankQbut-not touching it, 'Diskl fi is carried "on-one end of a shaft 150, the 'otherrendefof f -"-Ratchet wheel 20 is conneetedjwith clutch 22 (-see Fig. 4) operating on-theidrlivwhich carriesa hand lever 17, and this hand lever is'connected by a rod'18witli'aipawl. 19 in line with, but just out-ofmeslr with a -ratchetwheel'20. Spring 21 tends to bring the pawl 1 into mesh. with the ratchety-and 'vvould'do so but for the stop on the diskdf), wvhich', by connections'150, 17 ,18, is pressed against the horizontal end of bell-crankv 14.

mg pulley 23 as follows: The driving pulley is mounted 'to -turnfreely on the-driving -shaft 24,*to which is keyed pinion 25 'in mesh with gear 1'.

the hub of the clutch.

27 is an annular friction ring carried by the clutch and pressed againstthe bored out driving pulley 23, in the direction shown by face of the driving pulley by springs 28.

As shown in Fig. 4 the clutch is'diseonnected. Now suppose power to be applied to the arrow. The pressure of the friction ring 27 is sufficient to make the clutch member 22 turn with the driving pulley, freely on thereby driving the machine. Now should an operator inadvertently protrude his fingers too near the working edge of the anvil z in the lowering of the die the finger Shaft 24'carries a pin 26 which passes through an Oblique slot in:

guards 6 will contact with his fingers first and will be deflected upward. Instantly pin 13 on lever :12 will be. kicked back, tripping -=bell -crank'lever 14 off of stop on disk 15, and- 's'pr'ing 21 will then be released to throw pawl 19 into mesh with ratchet \vheel'ifl. Ihe*s'topping o'fratchet wheel 20 at once "'forces pi n 26 to move in its slot thereby drawingclutch 22 out of the driving pulley -.23;which.continues to turn freely on shaft 24, against 0nly the comparatively slight friction of ring 27,JIIItll'.SllClLtllllCMS the (,POWQI'. is shut off {or the tripping mechanism gis reset-.3 ;T his.latter is accomplished by turning'handlever 17 until pawllfl is cleared of -:the"ia.tchet .wheel and the horizontal arm of .rbell-crank 14 is again caught bythe stop on cdi'sk 1.5.? gniRatchetAvheeIiQQis made witha wide ienough-.face;to,prech1de its overriding pa wl :19.in its-lateral.movement. .-\s is readily .:seeni.this pai\ 'l and rat chet niightbc sup 1 plantfed by: another; equivalent form of stor eifor rclllltchs ine nber.22. andthis without do sipartinggin: any wayfrom theispirit of tin einventioni ()tlierpossiblerhanges in detail will occul .5itmthcjskilledmechanicand the invention i: itherefore not limited to the precise construe etio nfishown-herein. butis the best 'embodi imentimf, the' invention for. realizing the re .sults;fZQnti11plated-.- vii. Haai ingmow fully described our inven tion, what we claim and desireto protect .b i-Letteis.Latentis:

1.,{In a staying machine, the combinatio! \uthpthenanvil the movable die. the driving uwheel; driven mechanism for reciprocating the .'inovable die, .and a driving conneetim .wbetween thejdriving wheel and driven meeh ,ani'smfof tripping mechanism located along side said anvil and (lie; and normally. sta tionary-means adapted to be actuated b said tripping mechanism to disrupt th driving connection between the drivin; wheel and driven mechanism. I -.,2. In a staying machine. the combinatiol --.with the anvil, the reciprocating die cooper 'ating with the anvil, the driving whee ,driven mechanism for reciprocating the di( :and a ,driving connection between the driv 'ing wheel and the driven mechanism, o tripping mechanism located alongside th coiiperating parts of the anviland die wile the ;die is approximated toward the anvi and normally stationary means adapted t be actuated by the tripping mechanisn .when displaced by an obstruction adjacer to the face of the anvil, to disrupt the dri\ ing connection between the driving \\'ll8( and driven mechanism.

3. In a staying machine. the combinatio with the anvil, the reciprocating die eotipei ating with, the anvil, the driving whee driven mechanism for reciprocating the di said driving connection.

ing wheel and driven mechanism. of a tripping leveriiiovable with the die andestending alongside the lower \vorl ing edge thereof. a spring holding the tripping lever in normal position. and mechanism adaptejd. when the tripping lever is i iioved against the actionot'i'ts spring. to be rel d to disrnpt Iii'af staying machine. 1th e combination .with the anvil. thedie ith'e driving wheel.

driven mechanism for reci 'ii'oeating the die. and a driving "co'nnectii'inbetween j-the'driving wheel and driven inechanisni. of a' tripping lever extending alongside the anvil and die. inecha'nisni'to disrii 'it'said driving connection. a holding lever normally maintaining said mechanism out of operation. and .ineans controlled by said ti'ippiiig'lcver to operate the holding lever to' release said mechanism.

6. In a staving machine. the combination with the anvil, the die the driviiig whceh? driven mechanism for reciprocating the die.

and a driving connection hetweenthe driving wheel and driven mechanism, of a trip-. ping lever extending alongside theanv l and die. mechanism to disrupt-said driving conncction. a holding lever normally maintaining said mechanism out of operation. a

spring tending to move said holding lever out of holding position. and means controlled by the tripping lever to allow said spring'to operate when the tripping lever is'moved from its normal position.

7. In a staying machine, the combination with the anvil. the die. the driving wheel.

driven mechanism for reciprocatingthe die, and a driving connection between the driving wheel and driven mechanism. of a tripping lever extending alongside the anvil and die, mechanism to disrupt said driving connection, a holding lever normally maintaining said mechanism out of operation. a spring maintaining the tripping lever in normal position. and lever mechanism connected with the tripping lever and adapted. when the tripping lever is moved from its normal position against its spring. to release the holding lever.

8. In a staying machine. the combination with the anvil. the die. the driving wheel. lriven mechanism for reciprocating the die.

and a driving connection between the drivint wheel and driven ineclcnisin. ot' a tripping lever extending alongside the anvil and die. mechanism to disrupt said driving connection. a holding lever normally inainlaining said mechanisni' out of operation, a spring tending to move the holding lever oiit of holding position. a spring inaintaining the tripping lever in norinal position,

and lever mechanism connected with the tripping lever and normally maintaining the holding levei' in holding position but adapted. when thetrippingleveris moved against its spring. to release the holding lever.

9. In a staying inachiiie,'the combination with the anvil. the die."the' driving wheel.

driven mechanism for recipiiwa'tin-g the die, anda dr vingconnection betweeirthe d-riving"\vheel and driven mechanism, of a tr ptending along tlie lowei"working edge thereof. a 'springl holdingthe tripping 'leveriii l w i s normalQpositiom mechanism to disrupt said drivii igiconnection.ii' holdiiiglever normally ,Iain't a ining IS21ltl llltClltllllSlll o'i'it of operation. an arniof-said lever' e'xtending verticall a spring tending to move the holding lever out of normalfposi'lion.and levei."iiiei.-hanism connected with the trippii'ig lever and reciprtmiting verticz'illvjtherewitlrand a part' \Vlltl'OOf moves along the vertical arm of the holding lever and normally restrains itpfroin actuation by its spring.

10. In a stalving inachiiie tlie combination with the janvil.'the'tlimthe driving wheel. driven inechanismifoi" reciprocating the die. and a driving connection betweenthe driving wheel and driven niechanisimot a trip ping lever extending alongside the anvil and die. a normally stationary" control" shaft.

mechanism controlled therefrom to render said driving connection operative or inop- (I:ltl\'( and means controlled by the trip- -ping lever to eontrol the turning of said shaft in direction to render said driving con neetion' inoperative. and manually operable means to tlirii the shaft in direction to reiider said driving connection "operative.

11. In a staying machine. the combination with the anvil. the die. the driving wheel. driven mechanism for reciprocatingthe die. and a norinall operative driving connection between the driving wheel and the driven mechanism, of means to render said driving connection inope -ative. a spring tending to so actiiate said means. a 'control shaft. connected with said means and adapted to hold the same from operation b v its spring, a holding lever adapted to so hold the shaft. a tripping lever in operative relation with the anvil and die. and devices controlled h v the tripping lever to operate the holding lever to unlock said shaft.

12. In a staying machine. the combination with the anvil, the die. the driving wheel.

spring but adapted, when the tripping driven mechanism for reciprocating the die, and a normally operative driving connection between the driving wheel and the driven mechanism, of means to render said driving connection inoperative, a spring tending to so actuate said means, a tripping lever in operative relation with the anvil and die, and a chain of mechanism between said lever and said means normally holding the latter from operation by its lever is moved from its normal position, to be operated to allow said spring to actuate said means.

13. In a staying machine, the combination with the anvil, the die, the driving wheel, driven mechanism for reciprocating the die, and a normally operative driving connection between the driving wheel and the driven mechanism, of means to render said driving connection inoperative, a spring tending to so actuate said means, a tripping lever in voperative relation with the anvil and die, a chain-of mechanismibetween said lever and said means normally holding the latter from operation by its spring but adapted, when the tripping lever is moved from its normal position, to be operated to allow said spring to actuate said means, and a shaft included in said chain of mechanism adapted to be manually reset to restore said chain of mechanism to operative position. i

.14. In a staying machine, the combination with the anvil, the die, the driving wheel, driven mechanism for reciprocating the die, and a normally operative driving connec' tion between the driving wheel and the driven mechanism, of means to render said driving connection inoperative, a spring tending to so actuate said means, a control shaft connected withsaid means and adapted to hold the same from operation by.its spring, a holding lever adapted to so hold the shaft, a spring tending to move the holding lever out of operative position, a tripping lever in operative relation with the anvil and die, and lever mechanism connected with the tripping lever and adapted to normally maintain the holding lever in operative position but adapted, when displaced from its normal position, to allow the holdin lever to be actuated by its spring.

15. n a staying machine, the combination wit the anvil and the die, a driven shaft, an mechanism actuated thereby for reciprocating the die, of a driven clutch member adapted to positively drive the shaft but having a limited movement relative thereto into non-driving position, a driving clutch member adapted to normally drive the driven clutch member, means to hold the driven clutch member from actuation by the driving clutch member, and a tripping lever in operative relation with the shaft but movable relatively thereto into non-driving position, a drivingelutch member adapted to yieldingly advance the driven clutch member from non-driving position to driving positiona nd then drive the same positively, means to retract, the clutch from driving to non-drivingposition, and a 1 tripping lever ,in operative relation with the anvil and die and adapted when displaced .from its normal position to render said means operative; I I v 17. Ina staying mach1ne,'thejcombination with the anvil and the die, adriven shaft, and mechanism actuated thereby for reciprocating the 'die," of' a; driven clutch member sleeved on the shaft and movable longitudinally thereon, when turned relatively thereto, into driving and non-driving position,'a driving clutch member having a yielding engagement with the driven clutch,- member to turn the same into driving position and havinga positive engagement with the driven clutch member ,when the latter is so turned into driving position, means to lock the driven clutch member from turning, and a tripping lever in operative relation with the anvil and 'die and adapted when displaced from its normal position t render said means operative.

18. In a staying machine, the combina tion with the-anvil and the die, a driver shaft, and mechanism actuated thereby f0 reciprocating the die, of a driven clutcl member sleeved on the shaft, a pin on'th shaft engaging an inclined slot in'the drive: clutch member, a driving clutch member, yielding friction device between said clutc members whereby the clutch is turned upo the shaft into positive driving engagemer therewith and also moved axially on tlI shaft, a relatively positive' friction devi between said clutch members adapted to l rendered operative by such axial movemel of the driven clutch member, means to arre the movement of the driven clutch memb thereby causing the shaft, when in oper tion, to advance out of driven engageme with the driven clutch "member and mo the driven clutch member axially out positive driven engagement with the dri ing clutch member, and a tripping lever operative relation with the anvil and adapted when displaced from its normal I sition to render said means operative. I 19. In a staying machine, the combii tion with the anvil and the die, a driv shaft, and mechanism actuated thereby I recipri'u-ating the die of a driven elnteh member sleeved on the shaft, :1 pin on the shaft engaging: an inclined slot in the driven clutch member, a driving, elnteh meinher recessed to receive the driven clnteh member, a spvin e pressed friction deviee carried by the driven ('lutch nien'iher and engaging the base Of-Silhl recess. a friction device earried hy the periphery of the driven cluteh memher and adapted to engage the wall of said recess, means to arrest the'turning movement of the driven (-lnteh memher. and a tripping lever in operative relation with the. anvil and die and adapted \vhen displaeed from its normal position to render said 15 means operative.

In testimony of which invention. we have hereunto set our hands, at Philadelphia, on the second day of ()etoher. 191-").

HEQRY JAK'KSUN. JOHN U. HUR'I'UX. \Vitnesws lhzmmx ILmvEv, G. E. THRASIIFJL 

